1.Hip-
Take the measurement at the base of the belt loops. This measurement can be fairly snug. This measurement will be approximately 4" larger than the waist size of your pants.

2.Upper-
Thigh-Measure around the uppermost and largest point of the thigh at the crotch. You may want to leave the tape a little looser if you are measuring for a zipper leg chap.

3.Mid-Thigh-
Measure half way between the upper thigh and the center of the knee. You may want to leave the tape a little looser if measuring for a zipper leg chap.4.Knee-measure at the center of the knee. You may want to leave the tape a little looser if measuring for a zipper leg chap.

5. Calf-
Measure at the largest part of the calf with boots on. You may want to leave the tape a little looser if measuring for a zipper leg chap. We recommend adding 2" to a snug measurement for a western style shotgun chap so that the chaps can slide up and down at this point without restriction.

Testimonial
I found exactly what i was looking for at westernsaddle.com. no fuss, no hassle!! the item i ordered (western chinks) arrived extremely fast after purchase! they are exactly like the description, only better!!! i will definately order from western.saddle.com again in the near future!!!! a customer for life, Patti Stephens